| A | B |
|---|
| Eubacteria | Kingdom that makes up the domain Bacteria |
| Kingdom | Largest and most inclusive taxon in Linnaeus’s system |
| Genus | A group of closely related species |
| Taxonomy | Science of classifying and naming living things |
| Domain | Newest and largest classification category |
| Family | Group of genera (pl. of genus) that share many characteristics |
| Phylogeny | Study of evolutionary relationships among organisms |
| Genus and species | Two parts of a scientific name |
| Binomial | Made up of two names |
| Order | Group of similar families |
| Bacteria | Largest domain of unicellular prokaryotes |
| Archaea | Smallest domain of unicellular prokaryotes |
| Taxon | Group into which organisms are classified |
| Eukarya | Domain of all organisms whose cells have nuclei |
| Class | Group of closely related orders |
